RE: [CAD_CAM_EDM_DRO] EMC, freqmod.o, A-axis, .ini settings, oh my!

Hi, Tom:

Why not just dump the Taig drivers and use either Camtronics or Geckos? In
kit form, the Camtronics board will cost you around $160; Geckos would run
around $400 or so. If you make the connectors plug compatable with the
drivers supplied by Taig, you'll still have a backwards compatable path
should you want to continue to use the Taig software at times.

-- Jerry


|The upshot of this is that switching to steppermod.o would involve
|re-hacking the source to make four phase output work. Hopefully real soon
|now I'll be able to afford the electronics to convert step/dir to four
|phase output so I can use EMC talking step/dir. That'll also mean I can
|run the whole beast off a single parallel port. Some day (hopefully
|soon...)
|
|In the mean time I'm trying to get things working. DANG this is driving
|me nuts!
|
|If I find anything, I'll let you know.
|
|Tom
|
|> > -----Original Message-----
|> > From: Tom Benedict [mailto:benedict@...]
|> > Sent: Monday, August 19, 2002 11:24 AM
|> > To: CAD_CAM_EDM_DRO@yahoogroups.com
|> > Subject: [CAD_CAM_EDM_DRO] EMC, freqmod.o, A-axis, .ini
|settings, oh my!
|> >
|> >
|> > Here's the setup:
|> >
|> > I've got a stepper-based mill that's got four axes. The A axis is a
|> > rotary table that's bolted to the mill bed so the axis points
|parallel to
|> > the X-axis.
|> >
|> > I'm running the latest rev of the BDI, and the motors are set up to use
|> > freqmod.o.
|> >
|> > I'm trying to tune the .ini parameters for the fourth axis so I can
|> > address the rotary table in units of degrees. The linear axes
|are being
|> > addressed in units of inches.
|> >
|> > I've got 200 step/in motors that are being half-stepped. The
|linear axes
|> > have 20TPI leadscrews, so that winds up being 8000 steps/inch.
| The rotary
|> > axis has a 1:72 worm gear on it, and uses the same motor as the linear
|> > axes. So at 5 degrees per revolution of the motor, that's 80 steps per
|> > degree.
|> >
|> > Now for the troubleshooting:
|> >
|> > I've got the linear axes pretty happy. I don't have my .ini
|file in front
|> > of me, but I use an INPUT_SCALE and OUTPUT_SCALE of 8000.0 0.0,
|> > LINEAR_UNITS of 0.03937007874016 in [TRAJ] and UNITS of
|0.03937007874016
|> > inside each [AXIS_*] section (I'm using inches), and a P of 500.0.
|> >
|> > I've got ANGULAR_UNITS set to 1.0 in [TRAJ] and UNITS set to 1.0 in
|> > [AXIS_3]. With all the other parameters set the same, if
|INPUT_SCALE and
|> > OUTPUT_SCALE is set to 8000.0 0.0, the axis works, but it's not being
|> > addressed in terms of degrees. If I change INPUT_SCALE and
|OUTPUT_SCALE
|> > to 80.0 0.0, the axis ceases to function.
|> >
|> > I've tried dinking with this a fair amount. I can marginally get it
|> > working with the SCALEs set to 800.0 0.0, and address it in
|terms of tens
|> > of degrees (so G0 A9.0 would rotate it 90 degrees), but obviously this
|> > isn't what I'd like it to do.
|> >
|> > Has anyone got a stepper system using freqmod.o to work with a rotary
|> > axis? Can anyone share a success story that would help me get
|this thing
|> > working?
|> >
|> > Any and all help is much appreciated.
|> >
|> > Thanks,
|> >
|> > Tom
|> >
|> >
|> > Addresses:
|> > FAQ: http://www.ktmarketing.com/faq.html
|> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
|> >
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|>
|> Addresses:
|> FAQ: http://www.ktmarketing.com/faq.html
|> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
|>
|> OFF Topic POSTS: General Machining
|> If you wish to post on unlimited OT subjects goto:
|aol://5863:126/rec.crafts.metalworking or go thru Google.com to
|reach it if you have trouble.
|> http://www.metalworking.com/news_servers.html
|>
|> http://groups.yahoo.com/group/jobshophomeshop I consider this
|as a sister site to the CCED group, as many of the same members
|are there, for OT subjects, that are not allowed on the CCED list.
|>
|> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
|POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
|EXCEPTIONS........
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|
|
|Addresses:
|FAQ: http://www.ktmarketing.com/faq.html
|FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
|
|OFF Topic POSTS: General Machining
|If you wish to post on unlimited OT subjects goto:
|aol://5863:126/rec.crafts.metalworking or go thru Google.com to
|reach it if you have trouble.
|http://www.metalworking.com/news_servers.html
|
|http://groups.yahoo.com/group/jobshophomeshop I consider this as
|a sister site to the CCED group, as many of the same members are
|there, for OT subjects, that are not allowed on the CCED list.
|
|NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
|THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
|
|Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
|Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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|URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
|bill,
|List Mom
|List Owner
|
|
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